Sewage-screening apparatus.



A. M. LEONI & A. F. SCHREINER.

SEWAGE SCREENING APPARATUS. APPLICATION FILED FEB. l. 1913.

Pafented July 11, 1916- 5 sugars-sump I.

Wale a. tine INVENTORS WITNESSES:

I ATTORNEY;

A. M. LEONI & A. F. SCHREINEK SEWAGE SCREENING APPARATUS. APPLICATION FILED 53. I, 1913.

5 SHEETS-SHEET '2 wmvs'ssss; Mrs/Woks Patented July 11, 1916.

A'. M. LEON] & A. F. SCHREINEFLY v SEWAGE SCREENING APPARATUS mwuclmou man m. 1. 1913.

Patented, July 11, 1916.

s SHEETS-SHEET a 1 WITNESSES:

A. M. LEONI & A. F. SCHREINER. SEWAGE SCREENING APPARATUS.

APPLICATION FILED FEB. b 1913. 1,190,920.

Patentd July 11, 1916.

5 SHEETS-SHEET 5- 45 4 is a' vertical section takenthrough the sidejwall ofthe screening chamber and particul larly illustrating the means for guiding the STATES PATENT OFFICE.

ALPHONSE M. LEONI, OF- BROOKLYN, AND ALBERT F. SCHBEINER, LONG ISLAND CITY, NEW YORK, ASSIGNORS TO SAID ALPHONSE M. LEONI.

SEWAGE-SCREENING APPARATUS.

Application filed February 1 To all whom it may concern Be it known that we, ALrHoNsE M. LEONI,"

' a subject of the King of Italy, and ALBERT F. SGHREINER, a citizenof the United States, residing, respectively, at Brooklyn, New

, York, and Long Island City, New York,

have invented certain new and useful 1m.- provements in Sewage-Screening Apparatus, of which the following is a c1ear,yfull,

and' exact description.

Th1s 1nvent1on relates to a screening apparatus for treatingthe sewage of cities or towns so as to prevent pollution of the waters or marshesinto which the sewage drains. The plant in which this screening apparatus may be used should comprise drying apparatus for drying the matter removed from" the .sewage previous to d e-- stroying it by burning.

One of the 'objectsof the present invention is to produce a screening ap'paratus'of very simple construction which will operate effectively in practice.

Other objects of the invention will appear from a thorough understanding of the invention.

The invention consists inv the general combination of parts and in the simplicity-of the details hereinafter described, all of which contribute to produce an eflicient screening apparatus. j I

- A' preferred embodiment of our invention will be particularly described in the follow ing specification while the broad scope of our invention will be pointed out in the ap- In the drawings, Figure 1' is a vertical section taken through the screening chamber and illustratingdiagrammatically the position andarrangement therein of our screening apparatus; Fig. 2 is a horizontal sectional planof the apparatus; Fig.3 is a. side elevation .upon an enlarged scale of the screen together with its contiguous parts; in this view certain parts are omitted; Fig.

Figf hshowing it a displaced position but illustrating its relation to the screen in guidingthe' same; Fig. 6 is asection passdown through apartof the screen and;

p Specification of Letters Patent.

Patented July 11, 1916.

, 1913, I Serial no. 745339.

struction or the guide rollers which-may support the screen; Fi ,7 is a fragmentary view showing one of t e wheels which may support and. guide the screen, and illustrate ing the manner in which the screen runs around the wheels when the apparatus is in operation; Fig. 8 is a vertical cross sectiontaken through ,one of thearticulations or .joints in the screen and illustrating the preferred construction therefor; Fig. 9 is a verticalsection passing down through the parts shown in Fig. 8 and particularly illustrating means which may be employed for keeping the screen in alinement on' the wheels; Fig. 10 is a plan showing a short portion of the screen and illustrating. the manner in whlch it may be built up of separate screen plates; 'Fig. 11 is a section taken on the line 11-11 of Fig. 10 but upon an enlarged scale, and further illustrating details of the construction of the screen; Fig. 12.is a side elev'ationshowing a portion of the screen at a joint with the parts in an inverted position; Fig. 13is a plan showing a portion of the screen adjacent to a joint; Fig. 14 is a vertical section through the screen taken on the line 1414 of Fig. 10, and further illustrating the construction of one of the articulations or joints'of the screen; Fig. 15 is a side elevation and partial'section showing the preferred construe-1 tion of a sprayer which may be used in conmotion with the screen; Fig. 16'is a front elevation showing a portion of the sprayerhead at one end thereof; Fig. 17 is a cross section through the sprayer-head and p articularly illustrating the means for adjusting the stream issuing therefrom; and Fig. 18 is an end'elevation of the sprayer-head, the clamping bolt which" holds the head in position being shown in cross section.

Referring more particularly to the parts,

1 represents a screening chamber into which the inlet 2 from the ,sewer leads. chamber adjacent tothe inlet we form a 0nd this pockefla bafile or wall 1 is for'me pletely across the chamber and substantially touchingthe side walls 5 thereof. 'The sew- In the pocket 3 which tends to catch. solid matter, a be transversely and extending com a e moves slowly from the inlet 2 and long1tudinally in the chamber toward the out let-6; in the presentinstance. the velocity of I i v sewage and preferably in an inclined direction so that it sln'ms the surface of the sewage and picks up solid matter carried in the sewage. range this screen in the form of an endless belt or screen 7, the ends of which pass around guide wheels 8 and 9, the former of which are immersed in the sewage and below the waterline indicated in Fig. 1. The

' upper wheels 9 are at a point elevated above the waterline, and when the apparatus is in operation, the screen is driven slowly, preferably by rotating the shaft 16 carrying the .upper wheels 9, and the direction of rotation is that indicated by the arrows in Fig. 3.

The screen 7 is preferably formed of flat sections 11 which are connected together by joints or articulations 12. The upper run of the screen is preferably supported on guide rollers 18 preferably arranged in transverse wheels 8, and this tends to produce a slight rows, one of which rows supports the upper run of the screen directly under and opposite each of the screw conveyers. The

wheels 8 and 9 may be of polygonal form and are preferably formed with'means such as the sockets 14 for engaging the. articulations of the screen. As illustrated in Fig. 2, we have shown four of the wheels 8 mounted on a common shaft 15 and correspondingly placed upper wheels 9 mounted on a similar shaft 16. As the lower wheels 8 rotate, there will occur a slight periodic rise of the lower portion of the screen as it runs off of the and down vibration of the lowerportion i of the screen. In order to restrict this up and down vibration to the lower portion of the screen, we prefer toprovide guiding means 17 at the side edges of the screen which insure that the upper portion of the screen above this stantially straight ine. This guiding means Fig. 1, so as to accommodate the movement- 17 may beconstructed as illustrated in Fig. 4, comprising a wall bracket rovi ded-with guide rollers 18. between whic the edge of tween the edge of the screen andthe side walls near this point, we provide clips 19 which are preferably bent as illustrated'in of the screen and so as to blanket the forward side of the upper guide rollers 18.

We prefer to construct and arof simple tubular form having hubs 32 which are received inithe'lower ends of thetrunks 30. On' one sidethe sprayer-head 'ispro'-; .vided with a longitudinalslot 33-, the'open-v o'rnt will move in a subiae eao Above'the guiding means 17 we provide a simple, straight cleat 2 0 which is attached to thewall. These clips 19 and cleats 19 are 7 preferably formed of angle-iroil, the flanges of which-project out over theedges of the screen;

We provide means for removing solid matter'from the upper face of the screen and prefer to divide this work between two transversely disposed conveyers, the .lower of which is not so near the screen as the up per one. -These devices are preferably in the form of two conveyer screws 20 and 21 which are mounted transversely to the screen. The periphery of the screw 20 may be within one-half inch or so of the surface of the upper run of the screenwhile the periphery of the upper screw 21 isvery near to the screen so as to practically touch the surface thereof. Behlnd the conveyer screws we prefer to provide guides 22 inthe form of shields, the lower portions of which may curve downwardly and forwardly so that the edges lie very-near the surface of the screen. These conveyer screws are driven at a relatively high rate of speed throughgear chains 23 and 24, and the conveyers are preferably of very hlgh pitch so that they will substantially catch all material moving upwardly on the screen. However, if any material passes theascrews, it will be arrested by the shields orguides 22.

In order-to prevent clogging of the material at theconveyers 20 and 21, we provide means for loosening the material at this we point and this preferably consistsof 1 a sprayer 25 which. should extend transversely of-the screen and preferably between the screws so that it'may direct a jet26. onto the 1 screen near thescrew 20. This sprayer is 105 preferably constructed" as illustrated in Fig. I 15 and is preferably hung from a horizontal supply pipe 27 by meansof tubular arms28, and these tubular arms support a tubular pipe connection 29, to the ends. of which curved trunks 30 are attached and between the ends of these trunks 30 a sprayer-head 31 is mounted. 1 This sprayer-head is preferably.

ing of whichmay be regulated by platetimadjustably secured inpositiom This sprayer head may be clamped many-fixed adjustedlfio position desired, preferably 1 by meansi ofga j a' tie-rod 35' which, passes longitudinallythrough the same andgthe ends-10f pass to the exteriorofthetrunks .3 have boxes 36 formingseats' for the a z 1 2a the tie-bolt and for the clamping By. loosening the nut 37,. evidently .th sprayer-head can be adjusted-as desired an when the nut .37 is tightened,- tlie sprayerhead will be'securely heldin, adjusted poi sition. In order to clean the surface ofthe screen thoroughly beyond the conveyors, we prefer to provide a-second sprayer 38 which is substantially similar to the sprayer just described. Both Sprayers are supplied with water by horizontal pipe connections 39 and 40. The material which is advanced by the conveyers and 21 is driven laterally toward a discharge point 41 which may be on the right 'side of the chamber as indicated in Fig. 2. At this point the matter is accumulated in a hopper from which it can be removed from time to time to a drier. After removal from the drier, it is burned.

The preferred construction of the screen is that illustrated in Figs. '10 and 14v in;

elusive. The principle on which this screen is constructed relieves the plates which form the screen of any substantial tension, at the same time permitting the formation of serviceable joints between the screen sections which permit the screen to bend as it passes around the wheels. The tension in the screen ispreferably carried in two chain sections 42 between which the body of the screen lies. These chains 42'are preferably formed of long links 43 and short links 44,

said short and long links being connected alternately together, the arrangement being such that the corresponding links of one chain section are connected with the corresponding links of the opposite chain sec.- tionsby transverse rods 45. On account of the short links, the rods are arranged in pairs. These rods are utilized to support the sections 11 of the screen. These sections 11 are preferably in the form of plates 46,

v .the bodies of which are provided with a great number of perforations 47, as illustrated in Fig. 13, the outline of the perforated area being indicated by the dotted line 48 in Fig. 10. The transverse edges or ends of the plates 46 are preferably formed into rolls 49 which pass around a transverse rod and the longitudinal edges of the plates 46 are preferably formed of flanges 50. The

flanges 50 of adjacent plates are preferably separated by bars 51, theedges of which extend below the flanges as indicated in Fig.

11. These bars 51 run upon the aforesaid rollers 13' and support the screen.

The rods 45 andthe rolls 49 are prefer.- ably completely inclosed on their inner sides by means of channelshaped shoes 53. Referring to Fig. 8 it will be seen how these shoes seat themselves inthe sockets 14 of i the wheels when the screen is passing around the wheels. rods of all wear which might be due to a concentrated rubbing action which would occur if the rolls or rods came in direct, contact with the sockets. It will be seenthat the rolls 49-pass gradually from the round' into the flat portion of the plates so that .as

' the joints flex, the opening between the adja- This relieves the plates and thecent edges of the two plates is kept substantially closed.

From an examination-of Fig. 3, it will be evident that as the wheel 9 rotatesthere will be a slight lateral movement of theupper run of the screenabove the conveyer 21 but'as the rollers 13 are also placed opposite the conveyers on the underside of the upper run of the screen they prevent any lateral movement of the screen at or below the conveyer 21. Furthermore, the wheels 9 are arranged so that the line of advance of the upper run of the screen is substantially tangent to the circumference described by the sockets of the wheel. .From this arrangement the lateral movement of the screen at this point is toward the shaft 16 and away from the conveyer 21.

In order to prevent the screen from shifting laterally, we prefer to provide clips or saddles 54 illustrated in Fig. 9, which may be attached to the channel so that as the 'screen moves' they pass near the edges of I the wheels and engage with the edges, thereof to prevent the shifting referred to.

The rollers 13 are preferably constructed as illustrated in Fig. 6. Each roller consists of a cylindrical shell 55 having a central fin 56 which runs in a peripheral groove formed between two fixed disks 57 clamped to a fixed arbor 59.

Special attentionls called to the advant- -age of admitting the spraying water by means oftwo inlets 28 instead of a single inlet; If a single inlet were used taking the supply coming from two directions, the velocities developed in the water coming from opposite directions would greatly .re-, f

guide wheels or pulleys 9, it will be evident that the upper portion of the screen above the screw conveyer 21 will rise and fall slightly as. the wheels-9 rotate. However, v

- the rollers 13 directly under the screw conveyer 21 support the. screen andprevent its moving away from. the screw conveyer. The distance'of the screw conveyer21 and its adjacent rollers 13 is su cient to in sure that there will always be'one-or more joints between. the pulley and the screw conveyer,which insures that this up-anddown movement can occur without injury to any of the-parts.

'It is understood the invention-described above is only one of the many forms the invention may take, and we' do not wish to be limited in our that the embodiment of and advancing the same in a direction inclined with respect to the water level of the sewage, a transverse row of rollers enga ing the under side of the upper run of the screen for supporting the same, and a screw conveyer disposed transversely 'to' said screen above the upper run thereof, and 0pposite to said supporting rollers for ad- 'vancing material gathered on said screen in a lateral direction to remove the same from the screen.

2. In a sewage screening apparatus, in combination, a screen, means for guiding and advancing the same in a direction inclined with respect to the water level of the sewage, a transverse row of rollers engaging the under side of the upper run of the screen for supporting the same, a screw conveyer disposed transversely to said screen above theupper run thereof and opposite to said supporting rollers for advancing material gathered on said screen in a lateral direction to remove the same from the screen, and a sprayer extending transversely of the screen for directing 'a V combination, a pair of endless chains 'com-.

spray onto the screen adjacent said screw conveyer.

3. In a sewage screening apparatus, in

combination, a'screen, means for guiding and advancing the same in a direction 1n-.

clined with respect to the water level of the sewage, a transverse row of rollers engaging the underside of the upper run of the screen for supporting the same, a screw conveyer disposed transversely to said screen above the upper run thereof and opposite to said supporting rollers for advancing material gathered onsaid screen.

in a lateral direction to remove the'same from the screen, a sprayer extending trans-. versely of the screen for directing a spray I onto the screen, adjacent .said screw conveyer, and a shieldover and adjacent the said upper run of said screen and between said sprayer and said screw conveyer."

4. In .a sewage screening apparatus in prising links, transverse rods connecting links at one of said chains to the corresponding links of the other of said chains, wheels having sockets receiving-said rods to drive said chains and screen sections supported between said rods, said screen sections-hav- Wheels having sockets receiving said rods to drive said chains, screen sections supported between said rods, and channels receiving said rods and adapted to seat in said sockets when said wheels drive said chains.

6. In a sewage screening apparatus incombination, a screen disposed in an inclined position and adapted to raise solid matter from the sewage, said screen being in the form of an endless belt, wheels over which said screen passes, and means for guiding the middle portion of the screen in a substantially straight line and permitting a lateral movement of the lower portion or" said screen as the same unrolls from the Wheels.

"Z. In a sewagesc'reening apparatus in combination: a screen disposed in an inclined position and adapted to raise solid matter from the sewage, said screen being in the form of an endless belt, wheels over which said screen passes, means for guiding a portion of the screen in a substantially straight line and permitting a lateral movement of the lower portion of'sai'd screen as the same unrolls from the wheels, said guiding means consisting of rollers. disposed above and be low said screen, and means projecting over said rollers and projecting over the laterally movable portion of said screen at the edge thereof, v v

8. In a sewage screening apparatus, in combination, an endless screen composed of a plurality of hingedly connected plates,

said screen disposed in an inclined position,

-means for driving the same in a direction to elevate solid material carried in the sewage, means for supporting the upperrunof said ,screen on the under side of said upper run, and a screw-conveyer disposed opposite to said supporting means for engaging the sewage on the screen and-for advancing the same laterally-off of the screen.

- Signed at New York city, N. Y., day of January 1913.

ALPHONSE M. LEONE. ALBERT F. SGHREINER.- .Witnesses BEATRICE Moms,

f A. lBnnNsmrN'.

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